Java

How to implement lazy initialization of the Singleton pattern?

Can you explain what anonymous classes are and how they are used in programming?

How to ensure access to object data within a method using the @Transactional annotation?

Junior — Middle

СБЕР

Where and for what is the abstract modifier used?

How are variables passed to methods?

Have you ever overridden the equals method yourself?

Is it true that primitive data types are always stored on the stack, and instances of reference types are stored on the heap?

What is the World Wide Web (WWW)?

Can you list the main properties or characteristics that classes can have?

What are the differences between the annotations @Component, @Controller, @Repository, and @Service in Spring, and what are their purposes?

How is object instantiation performed in object-oriented programming?

Has the same URL been used to configure the Spring DataSource source?

Junior — Middle

СБЕР

What prompted you to choose Quarkus for migrating your project?

What changes in the architecture and processes of the project have you noticed after transitioning to cloud technologies?

What is the main role of the Java Virtual Machine in executing Java programs?

What is UML? Explain what a diagram, notation, and metamodel are in UML.

What is dependency injection in software development?

Can you explain how SQL Injection attacks are carried out and how they exploit vulnerabilities in databases?

Junior — Middle

Уралсиб

Explain the principle of operation of self-regulating trees and their applications.

How is data search performed using indexing in PostgreSQL?

Junior — Middle

Билайн